insolent

adj

1. Insulting in manner or words, particularly in an arrogant or insubordinate manner.

   “Near-synonyms: arrogant, bold, cocky; see also Thesaurus:cheeky”

2. Rude.

   “Near-synonyms: insubordinate, offensive; see also Thesaurus:arrogant”

   “insolent behaviour”

   “insolent child”

   “insolent remark”

   ““I don't mean all of your friends—only a small proportion—which, however, connects your circle with that deadly, idle, brainless bunch—the insolent chatterers at the opera, the gorged dowagers,[…]the chlorotic squatters on huge yachts, the speed-mad fugitives from the furies of ennui, the neurotic victims of mental cirrhosus,[…]!””

noun

1. A person who is insolent.

   “What a way do you put yourself in miss! said the insolent.”

   “Diogenes Laertius reports that Diogenes was apt to take the identification with the dog at face value, as when he lifted his leg and relieved himself on a group of young insolents who teased him with a dog's bone […]”